/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

#include <stdio.h>
#include "VernonBootLoader_Config.h"
#include "VernonBL_Compatible.h"
#include "flash_func.h"

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

typedef  void (*pFunction)(void);

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

static volatile char led_blink_on = 0;

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

#ifdef __GNUC__
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

static pFunction JumpToApplication;
static uint32_t JumpAddress;
static int bootloader_run_notify_led_count;

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */

PUTCHAR_PROTOTYPE
{
	HAL_UART_Transmit(&huart1, (uint8_t*)&ch,1,HAL_MAX_DELAY);
    return ch;
}

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

uint8_t IAP_LoadAPP(uint32_t AppxAddr)
{
	if (((*(__IO uint32_t*)AppxAddr) & 0x2FFE0000 ) == 0x20000000)
	{
		/* Jump to user application */
		JumpAddress = *(__IO uint32_t*) (AppxAddr + 4); //PC指针地址
		JumpToApplication = (pFunction) JumpAddress;
		/* Initialize user application's Stack Pointer */
		__set_MSP(*(__IO uint32_t*) AppxAddr); //设置MSP指针
		JumpToApplication();
		return 0;
	}
	return -1;
}

void print_boot_message(void)
{
    printf("\r\n--------- Enter Vernon BootLoader --------\r\n");
    printf("\r\n");
    printf("========= flash partition table ==========\r\n");
    printf("|     name     |   offset   |    size    |\r\n");
    printf("--------------------------------------\r\n");
    printf("| bootloader   | 0x%08lx | 0x%08x |\r\n", BOOT_SECTOR_ADDR, BOOT_SECTOR_SIZE);
    printf("| setting      | 0x%08lx | 0x%08x |\r\n", SETTING_SECTOR_ADDR, SETTING_SECTOR_SIZE);
    printf("| application1 | 0x%08lx | 0x%08x |\r\n", APP_SECTOR_ADDR, APP_SECTOR_SIZE);
    printf("| application2 | 0x%08lx | 0x%08x |\r\n", APP2_SECTOR_ADDR, APP2_SECTOR_SIZE);
    printf("==========================================\r\n");
    printf("\r\n");
}

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{

  /* USER CODE BEGIN 1 */
  int8_t boot_state, boot_partition_select, err;
  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART1_UART_Init();
  /* USER CODE BEGIN 2 */

  print_boot_message();

  //write configuration
  err = write_settings_boot_state(RUN_APP_STATE);
  if(err != 0)
  {
	  printf("FLASH ERROR!\r\n");
  }
  err = write_settings_boot_partition(RUN_APP1_partition);
  if(err != 0)
  {
	  printf("FLASH ERROR!\r\n");
  }

  //read configuration
  boot_state = read_settings_boot_state();
  boot_partition_select = read_settings_boot_partition();

  switch(boot_state)
  {
	  case RUN_APP_STATE:
		  printf("[Bootloader]Start to run APP[%d] ...\r\n", boot_partition_select);
		  if(boot_partition_select == RUN_APP1_partition){
			  err = IAP_LoadAPP(APP_SECTOR_ADDR);
			  if(err != 0)
			  {
				  printf("[Bootloader]Run App error, please flash the new bin...\r\n");
			  }
		  }else if(boot_partition_select == RUN_APP2_partition){
			  err = IAP_LoadAPP(APP2_SECTOR_ADDR);
			  if(err != 0)
			  {
				  printf("[Bootloader]Run App error, please flash the new bin...\r\n");
			  }
		  }else{
			  printf("[Bootloader]Can not find the select settings of the partition\r\n");
		  }

		  break;
	  case UPDATE_APP_STATE:
		  printf("[Bootloader]Update APP...\r\n");
		  break;
	  case SUCCESS_UPDATE_APP_STATE:
		  printf("[Bootloader]Success Update APP...Then Reboot System\r\n");
		  err = write_settings_boot_state(RUN_APP_STATE);
		  if(err != 0)
		  {
		    printf("FLASH ERROR!\r\n");
		  }
		  __ASM volatile ("cpsid i"); //关闭总中断
		  HAL_NVIC_SystemReset();

		  break;
	  default:
		  printf("[Bootloader]Unknown Update APP...Error Code : %x\r\n", boot_state);
  }
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
	if(led_blink_on)
	{
		HAL_GPIO_WritePin(BOOTLOADER_RUN_NOTIRY_LED_GPIO_FAMILY,
				BOOTLOADER_RUN_NOTIFY_LED_PIN, GPIO_PIN_SET);
	}else{
		HAL_GPIO_WritePin(BOOTLOADER_RUN_NOTIRY_LED_GPIO_FAMILY,
						BOOTLOADER_RUN_NOTIFY_LED_PIN, GPIO_PIN_RESET);
	}
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 6;
  RCC_OscInitStruct.PLL.PLLN = 100;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 4;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */
void HAL_SYSTICK_Callback(void){
	bootloader_run_notify_led_count ++;
	if(bootloader_run_notify_led_count >= 600)
	{
		bootloader_run_notify_led_count = 0;
		led_blink_on = ~led_blink_on;
	}
}
/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {

  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
